var express = require('express')
var mysql = require('mysql');
var app = express();
//解决所有跨域问题
app.all('*', function (req, res, next) {
    res.header('Access-Control-Allow-Origin', '*')
    res.header(
      'Access-Control-Allow-Headers',
      'Content-Type, Content-Length, Authorization, Accept, X-Requested-With , yourHeaderFeild'
    )
    res.header('Access-Control-Allow-Methods', 'PUT,POST,GET,DELETE,OPTIONS')
    res.header('X-Powered-By', ' 3.2.1')
    //这段仅仅为了方便返回json而已
    res.header('Content-Type', 'application/json;charset=utf-8')
    if (req.method == 'OPTIONS') {
      //让options请求快速返回
      res.sendStatus(200)
    } else {
      next()
    }
  })
  
app.post('/login',function(req,res){

})